* Qualcomm MSM VFE

Required properties:
- cell-index: vfe hardware core index
- compatible :
    - "qcom,vfe"
    - "qcom,vfe40"
- reg : offset and length of the register set for the device
    for the vfe operating in compatible mode.
- reg-names : should specify relevant names to each reg property defined.
    - "vfe" - Required.
    - "vfe_vbif" - Optional for "vfe32". Required for "vfe40".
    - "tcsr" - Optional for "vfe32". Required for "vfe40".
- interrupts : should contain the vfe interrupt.
- interrupt-names : should specify relevant names to each interrupts
  property defined.
    - "vfe" - Required.
- vdd-supply: phandle to GDSC regulator controlling VFE core.

Example:

   qcom,vfe@0xfda10000 {
       cell-index = <0>;
       compatible = "qcom,vfe";
       reg = <0xfda10000 0x1000>;
       reg-names = "vfe";
       interrupts = <0 58 0>;
       interrupt-names = "vfe";
       vdd-supply = <&gdsc_vfe>;
   };
